..I've been using BCWipe and to my full satisfaction since its very first release. I understood that uninstalling processes leave a great deal of junk on the hard disk.This small program- til v2, granted by the army, allowed to use several passes, as to leave no trace at all of previous deleted data.
A cleaner hard disk made of my PC a safer space to work. You just must take care of having resources enough as to prevent crashes.
Price: Free Trial ($39.95) review details

..since the first Beta release. I'm not an expert , so I found it from the beginning highly reliable. Keeps getting better because the new features added.
I appreciate very much its ease of use(just one click, the ad says) and the fact that my PC is running quite alright after it. I like it very much, as long it is free. Or i should take away from my machine.
Price: Free review details